<template>
  <div>
    <span v-for="(item, index) in arr" :key="index">
      <input type="checkbox" v-model="choose" :value="item">
      {{item}}
    </span>
    <div>你选中的元素，累加的值和为：{{allTotal}}</div>
  </div>
</template>

<script>
export default {
  data(){
    return{
      arr:[9, 15, 19, 25, 29, 31, 48, 57, 62, 79, 87],
      choose:[]
    }
  },
  computed:{
    allTotal(){
      return this.choose.reduce((sum,item)=>{
        return sum += item
      },0)
    }
  }
}
</script>

<style scoped>

</style>
